Using orifice meter which aspects should pay attention to? Orifice flowmeter is one of use more flowmeter in flow measurement, installation and use of it, there is strict operation specifications, then we say the use of orifice flowmeter which aspects should be paid attention to. Working principle: the orifice meter for determination of gas flow in gas drainage pipeline. When gas concession road through the orifice plate, the velocity increases, the pressure difference on both sides of the orifice plate, and the flow rate and pressure difference exists between a constant relationship, through the pipe pressure difference can be calculated in the flow of gas. 1, the upstream side of the orifice plate measuring tube length for 10 d, the length of the downstream side of 4 d. 2, the measuring tube must be meet the surface clean, no sag and sediment, the relative roughness K/D should be less than or equal to zero. 001. 3, measuring tube length of straight pipe inner surface roughness of the K/D less than or equal to 0. 001. 4, installed in the measuring tube orifice, open around limited to measure the tube axis coaxial, orifice upstream side face perpendicular to the pipe axis, vertical degree is less than + / - 1%. 5, open the power supply, no traffic, then if the pipe should be 0 indicates flow; If the pipe with fluid flow, such as the measurement system is normal, flow of instructions will be correct. Otherwise, the system may not be normal, the equipment should be checked item by item. Can enter the running state, 6, after the installation process is as follows: open the pipeline valve, open the three balancing valve valve group, and then open the root valve, three guide valve valve group, finally close three balancing valve valve group, such as the operation order is not correct, may be due to two root valve opening is not synchronous, the differential pressure transmitter unidirectional compression and affect its service life. 7, when the root valve or pressure hole is blocked, can shut down three valve group, unscrewed the plug side of the water injection hole, twist on venting pipe pressure, blow hole dirt. Orifice meter installation and use of the note here, if you want to know more information flow meter can give us a message, or call.
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Abstract: the agricultural irrigation flow in open channel with electromagnetic flowmeter accurately measure boost agricultural development information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Irrigation and water conservancy electromagnetic flowmeter metering accurate billing channel power status a farmland irrigation, agricultural water price reform: water is the source of life, also is the lifeblood of agriculture. The progress of the water conservancy facilities and construction of water conservancy technology for agricultural production of artificial regulation and intervention is very important, that's right. More flow meter manufacturers choose model price quote you are welcome to inquire, here is the agricultural irrigation flow in open channel with electromagnetic flowmeter accurately measure boost agricultural development the article details. Irrigation and water conservancy electromagnetic flowmeter flow in open channel measurement accurate billing superfamily real Chinese shares a boost agricultural water price reform, farmland irrigation status: water is the source of life, also is the lifeblood of agriculture. Water conservancy facilities and construction of water conservancy technology for agricultural production of artificial regulation and intervention is very important, to do a good job in agricultural disaster prevention and mitigation work, to ensure the well-off years harvest, build long-term basis also has a special meaning for poverty alleviation. In early 2016, the State Council general office issued a 'about to push forward the reform of agricultural water price comprehensive opinions' ( The hair [ 2016] No. 2) Specifically to use 10 years or so, we should establish and improve water price and water right, award, construction and management mechanism, promote agricultural water from extensive to intensive changes. Subsequently, closely cooperate with relevant departments, according to guide and support the country steadily promoting agricultural water price reform. Governments at all levels actively implement the reform main body responsibility, follow the principle of adjust measures to local conditions, first try, active exploration from the belt surface, coordinating mechanism construction and project construction, and gradually expand the scope of implementation reform. It is understood that at the end of last year, nearly 800 counties nationwide ( Irrigation area) The pilot reform, the total implementation area of more than 52 million acres, of which ten thousand mu in 2017, more than 3000 new, reform areas expanded steadily, and explore a batch of typical methods and experiences. Pilot areas of water-saving effect began to emerge, and the average water about 100 cubic meters per acre, irrigation cycle shortened about 20% on average. ” People rely on food, and seedling growth on water. ” Water is the source of life, is also the foundation of agriculture. Under the condition of the fresh water co. , LTD. , improve the efficiency of irrigation water is to ensure that food production even continue to an important way to increase production. Today's water conservancy project is also changing, in order to improve the efficiency of irrigation water. Improve the efficiency of irrigation water, water irrigation, more less is not only an important way to resolve the water shortage, also is the necessary way of agricultural modernization. “ In recent years, China has been pushing the development of water-saving irrigation technology and promotion, with the deepening of ecological development idea, the future will have greater achievements in this respect. ” 。 Second, the intelligent electromagnetic flowmeter in the application of rural water conservancy agricultural channel: intelligent agricultural water-saving upgrade projects including irrigation control center and information platform, the foundation of the pumping station renovation and automation, field irrigation automation three parts. Irrigation control center and the information platform is the core of the project, including computer irrigation control software and mobile APP, big data platform monitoring software, the soil humidity sensor, the small weather stations and video monitoring and other high-tech equipment installation and construction, through real-time acquisition and data analysis to provide scientific guidance for automatic irrigation. Transformation and the basis of pumping station automation part includes fertilizing device, water pump and flow meter for the construction of the remote control. With cucumber, fertilizer and irrigation water can deliver nutrients to crops on a regular basis through a pipeline; Field irrigation automation include three kinds of form a complete set of water supply pipe, and 75 sets of 150 sets of automatic valve is installed solar field controller, is the main irrigation water supply equipment. Installed in the about 200 mu of land, a total of 23 field controller and 46 valve and two meter installed in the each branch pipe to check for irrigation water. ” From here, you can switch pipe valves and check the voltage battery status of the controller. ” Three electromagnetic flowmeter flow in open channel, rural water pricing is introduced: electromagnetic flow in open channel flow system is composed of a flow indicator, ammeter, sensors and liquid level meter, applicable to the reservoir, river, water conservancy projects, urban water supply, sewage treatment, irrigation and water resources such as rectangle and trapezoid and culvert flow in open channel flow measurement. The accuracy of measurement: traffic 0. 5%, the water level 0. 5%, the system power consumption. 2. 15 va channel width 0. 5%, 5 - 30 m, depth of 0. 5 - 20m。 Field operation is stable, reliable data for the water district provides a convenient management of water resources and water saving. Let's take a look at the field application: agricultural rural water resources bureau of agricultural water pricing system of water scene flowmeter metering device platform, irrigation and water conservancy irrigation flowmeter flowmeter, rural, rural surface water irrigation flowmeter flowmeter, agricultural water, rural agricultural irrigation water pricing, irrigation water meter, water meter and farmland water pricing above is all there is in this article, you are welcome to inquire me factory flowmeter selection, quotation, etc.
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Abstract: the split type electromagnetic flow meter scale sensor installation guide information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. Split type electromagnetic flowmeter sensor is a kind of volume flow measuring instrument, the characteristics of split type electromagnetic flowmeter consists of sensor and flow converter of two parts. Is the main component of the measuring tube, electrode, excitation coil, iron core and magnetic yoke and shells. Pass. More flow meter manufacturers choose model price quote you are welcome to inquire, here is split type electromagnetic flow meter scale sensor installation guide for details. Split type electromagnetic flowmeter sensor is a kind of volume flow measuring instrument, the characteristics of split type electromagnetic flowmeter consists of sensor and flow converter of two parts. Is the main component of the measuring tube, electrode, excitation coil, iron core and magnetic yoke and shells. Sensor of measuring tube is a lining insulation of permeability alloys short tube. Is must be the electrical conductivity of a liquid or slurry flow body, be should not contain more ferromagnetic material flow or bubble, should according to the measurement of body temperature, pressure, corrosion and wear characteristics choose corresponding pressure levels, lining materials, electrode materials and instrument. In the process of measurement, it is not affected by the temperature of the measured medium, viscosity and density with conductivity ( In a certain range), The influence of. Just after liquid equipment calibration, it can used to measure the flow in the other conductive liquid, so the installation of sensor is particularly important, mainly do the some requirements; Preferred split type electromagnetic flowmeter sensor of straight pipe upstream and downstream of the installation points has certain requirements, otherwise it will affect the accuracy of measurement. If sensors installed upstream of point reducer, sensors upstream should be not less than 15 d straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. If sensors installed upstream of point is gradually expanding, sensors upstream should be not less than 18 d straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. If the upstream of sensor installation points 90 & deg; Bend or sub, sensors upstream should be not less than 20 d straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. If the sensor installed upstream of point on the same plane has two 90 & deg; Elbow, sensor should not be less than 25 d upstream straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. If the sensor installed upstream of point in different plane has two 90 & deg; Elbow, sensors upstream should be not less than 40 d straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. Flow control valve or pressure regulating valve installed on the downstream side of the sensor 5 d as far as possible, if must be installed in the upstream of the sensor, the sensor should not be less than 50 d upstream straight pipe sections, such as the downstream straight pipe section should be not less than 5 d. Pay special attention to the sensor installed upstream of point relatively close if equipped with valve, switch valve and affect the service life of the sensor is great, very easy to cause * sexual damage to the sensor. Sensors to avoid the overhead of very long pipe installed on the sensor, so that over time, as the drop sensor is very easy to cause between the sensor and the flange seal leakage, if necessary when installation, must be set separately in the upstream and downstream of sensor 2 d pipe clamp device. Split type electromagnetic flowmeter installation attention split type electromagnetic flowmeter sensor should be installed vertically, and fluid flows from bottom to top, in order to meet the solid and liquid two is in a state of mixed. The reason is if there is solid in the medium ( Sand, gravel particles, etc. ) Prone to precipitation. Have fish and weeds in another line of fish swimming in the pipeline, will cause the flowmeter output swing; Hang back and forth near the electrode weeds can also cause the output of the meter is not stable. Set at the entrance of upstream flow meter metal screen blocking fish and weeds into the measuring tube. Split type electromagnetic flowmeter to prevent negative pressure pipe set improper operation will cause negative pressure sensor inside. Contraction after cooling, the pipe pressure is in danger of forming negative pressure. The negative pressure caused by the lining and metal vessel, cause leakage electrode. In the vicinity of a split type electromagnetic flowmeter with negative pressure to prevent valve, open the valve on atmospheric pressure, in order to prevent to produce negative pressure in the sensor. Split type electromagnetic flowmeter downstream attached to a vertical line, if use flow upstream of the valve to close or adjust the flow sensor, the sensor will form a negative pressure measuring tube. In order to prevent negative pressure, need to add back pressure or use downstream to adjust and close the flow valve. Split type electromagnetic flowmeter proper maintenance space, large diameter flowmeter are often installed in instrument well, for the sake of pipeline installation, wiring, inspection and maintenance convenience, need to have the appropriate space. For observation, connection and maintenance convenience, instrument installation should have a certain height from ground, in order to facilitate cleaning, installation. Let's talk about how to better use, production installation of LDG model split type electromagnetic flowmeter, correct installation flowmeter can have twice the result with half the effort, flow measurement is more accurate and reliable.
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Abstract: the electromagnetic flow meter scale what are special detection information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. A, electrode contact resistance measuring electrode spoon of liquid contact resistance, can be not discharged from the pipe flow sensor and indirect estimation juice electrodes and the lining layer surface general situation, help to analysis the cause of the problem. Second, the polarization of electrode voltage measurement electrodes with liquid. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a special electromagnetic flowmeter scale test what the article details. A, electrode contact resistance measuring electrode spoon of liquid contact resistance, can be not discharged from the pipe flow sensor and indirect estimation juice electrodes and the lining layer surface general situation, help to analysis the cause of the problem. Second, the polarization of electrode voltage measuring electrode polarization voltage between the liquid and will help to judge whether the fault of the unstable zero or output shaking caused by electrode is covered by pollution or. With 2 v dc digital multimeter, respectively measure the polarization between the two electrodes and ground voltage ( Electromagnetic flowmeter can not power, power measurement) 。 If two measured values closer to nearly equal, the electrode not contaminated or overwritten, electrode contaminated or otherwise be overwritten. Polarization voltage size is decided by the 'electrode potential of electrode material and the properties of the liquid measurements may be between a few mV to a few hundred mV. Because, in fact, in the operation of the two electrodes contamination situation can't be exactly the same symmetry, then the voltage on the electrode formed asymmetric common-mode voltage. Asymmetry of the common-mode voltage becomes differential mode signal, zero offset. Three measurement signal cable, signal cable interference from electrostatic induction and electromagnetic induction interference can make the electromagnetic flowmeter zero change. To determine whether changes in zero due to the effect of electric potential signal cable interference, to determine the influence degree of the interference range and the electromagnetic flowmeter. Four, determination of presence of grounding potential electromagnetic flow juice during normal use, such as sensors electricity (near Force) Machine status changes ( Such as leakage) , grounding potential changes caused by zero change. Check whether have the influence, the converter can be work terminal short circuit, grounding C terminal and protection of G to zero ( Or instruction value) Changes in judgment for ground potential. Five, the discriminant sometimes for pipeline stray current flow pipelines stray interference sources in the flow sensor also in downstream, upstream to narrow your search, try to reduce or eliminate stray current interference effects. Above is all there is in this article, you are welcome to inquire me manufacturer flowmeter selection, quotation, etc.
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Abstract: The selection information of the urban natural gas flow meter is provided by the excellent flow meter and flow meter production and quotation manufacturers. one. According to the previous data, the development of world energy was the peak period of coal in the 1920s, which accounted for more than 70% of the energy. From the 1970s to the 1990s, oil replaced coal, and oil accounted for 30% of the energy. 40% will be driven by natural gas by the early 21st century. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the details of the selection articles of urban natural gas flowmeters. one. According to the previous data, the development of world energy was the peak period of coal in the 1920s, which accounted for more than 70% of the energy. From the 1970s to the 1990s, oil replaced coal, and oil accounted for 30% of the energy. 40%, by the early 21st century, natural gas will gradually replace oil, and the percentage of natural gas in power is predicted to exceed 50%. The replacement and replacement of power has its own internal and external reasons. The internal reason is that oil production has risen slowly in the past 20 years, while natural gas has increased rapidly. From 1970 to 1996, the world's annual natural gas production more than doubled, while oil production. Production remained basically unchanged. It is said that the world still has abundant natural gas resources, which has laid a solid foundation for the development of the natural gas industry. The external reason for power replacement is that natural gas is an efficient, clean fuel and high-quality chemical raw materials, which greatly attracts users. The sharp deterioration of urban conditions is the biggest driving force behind the innovation of power structure. Vehicle exhaust emissions have reached the level of disgust, and the frequent occurrence of urban acid rain advises people that they can no longer maintain the original power structure. my country is a big country with rich natural gas capital. According to estimates, the prospective natural gas reserves are 38 trillion cubic meters, and the currently proven reserves are 1.6 trillion cubic meters. However, the development of the natural gas industry has been seriously lagging behind for a long time. As of this year, the output is more than 20 billion cubic meters, accounting for only 2% of the energy consumption structure (compared to more than 20% in the world). Very disproportionate. Recently, the authorities have attached great importance to the development of the natural gas industry, and have made serious policy decisions.“West-East Gas Pipeline”The start of my country's power structure has opened the curtain of serious adjustment of China's power structure. The city is the end user of natural gas application. Among the urban users, there are both industrial enterprises and urban public properties. It is a scattered user group. A major problem that must be dealt with in the use of natural gas is the natural gas flow metering system that needs and supplies to meet the requirements of the socialist market economy. Flow measurement is not only the basis for commercial settlement on both sides of natural gas supply and demand, but also the primary technical goal of gas consumption efficiency in the production part. In the production and operation management of enterprises, flow measurement is a daily and important technical basic task. Accurate flow measurement can timely improve the production process, improve product quality, reduce product cost, ensure safe production, rational operation management, and improve economic and social benefits. Everyone currently sees austerity on natural gas as a fuel for vehicles and for urban businesses and utilities. Replacing coal with gas as the fundamental fuel is the basic way to improve the quality of urban conditions. These parts all require flow measuring instruments suitable for user requirements. Because users are extremely messy and have various requirements for flow meters, the diversification of flow meter products is an inevitable trend. Then comes the question of how to choose the right instrument among such various types of flowmeters. The natural gas flowmeter for urban use and the natural gas flowmeter used for commercial settlement of long-distance pipelines have different requirements. The measurement objects it needs to deal with are generally low pressure (below 1.6MPa), medium and small flow (below DN200), and installation premise ( The length of the straight pipe section is short), the management and maintenance strength is weak, the function is simple and easy to understand, the operation is convenient, maintenance-free, and the price is moderate. In order to meet the above requirements, although there are many mature instruments, many development tasks are still required to meet the requirements of users.“Conform to the market and always work hard”Should be the motto of the manufacturer. two. Introduction to natural gas flowmeters The flowmeters that have been used or will be put into use generally have the following types: differential pressure flowmeters, turbine flowmeters, fluid vibration flowmeters, positive displacement flowmeters, ultrasonic flowmeters, target flowmeters and Mass flowmeter, etc. 1. Differential pressure flowmeter: including testing parts to save installation and uniform velocity pipes, etc. It is a type of flowmeter with a long history of use, rich and mature theoretical experience, perfect standards (except for the uniform velocity tube), and complete types and specifications. Before the 1950s, it could be the only natural gas flowmeter. It has many shortcomings: such as ordinary measurement accuracy, high premise requirements for field devices, large pressure loss, narrow limitations, etc.
However, with the increased prevalence of mass flow meter, it has become far more affordable.
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