Abstract: the turbine meter scale matters needing attention when installation information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

There are many different kinds of flowmeter and rotor flowmeter, electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, ultrasonic flowmeter, and so on.

Different flowmeter has its own unique characteristics, for the moment there is no a flowmeter is applicable to any place.
Changzhou.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is a turbine meter scale considerations when installing the article details.

There are many different kinds of flowmeter and rotor flowmeter, electromagnetic flowmeter, vortex flowmeter, turbine flowmeter, ultrasonic flowmeter, and so on.

Different flowmeter has its own unique characteristics, for the moment there is no a flowmeter is applicable to any place.

Instrument as the domestic well-known brand of flow meter manufacturer, for rotor flowmeter, vortex flowmeter, electromagnetic flowmeter is introduced more usually, today focuses on turbine flowmeter under the matters needing attention during installation.

Measure turbine flow, it will flow into the turbine speed first, then converting speed is proportional to the flow of electrical signals.

This flowmeter used for detecting the instantaneous flow rate and the total integrating traffic, its output signal to frequency, easy to digital.

Turbine flowmeter can take pulse output, can take 4 -

20 ma signal output, also has with the HART protocol.

The turbine flowmeter in when installation should pay attention to what aspects?

1, before the installation of turbine flowmeter, first to ensure the process pipe must be clean.

2, turbine flowmeter has an arrow pointing to, on the fluid flow in the piping needs and arrow is consistent, can't put wrong, and I will conform to the requirements of the manual installation environment, such as flow meter must be installed on the pipeline level, such as straight pipe before and after the need to have before 20 d after 10 d, and so on.

Such as installed in the outside need to avoid direct sunlight and rain prevention measures and so on.

3, flow meter connection pipe diameter and flow meter diameter before and after the need to agree, this is the requirement of the straight pipe before and after the above said, pipeline and flowmeter joint not protrude into the pipe, and pay attention to the pipe axis and axis flow meter to keep together.

4, if small impurities in the fluid, can be installed in front of the flowmeter filter, to eliminate the influence of impurities.

5, flow meter should be installed in the convenience of maintenance, no electromagnetic interference.

Factory production flow meter 37 years, have professional experience in flowmeter, selection and installation location of flowmeter can help.

Other problems can be consulting more flowmeter instrument.

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 information on the application of the metal tube float flow meter in the gas-liquid two-phase medium in the working condition is provided by the excellent flow meter and flow meter manufacturers and quotation manufacturers. In recent years, the ion-membrane alkali-making process in my country's chemical industry has developed rapidly. In the past few years, most of the devices were imported in full, including various online instruments. Now the equipment and instruments are gradually localized, which can not only ensure the quality, but also save a lot. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the application of the metal tube float flowmeter in the working condition of gas-liquid two-phase medium. Details of the article. In recent years, the ion-membrane alkali-making process in my country's chemical industry has developed rapidly. In the past few years, most of the devices were imported in full, including various online instruments. Now from the equipment to the instrument, it is gradually localized, which can not only ensure the quality, but also save a lot of foreign exchange. During the trial production stage of a large-scale chemical plant in Northwest China, it was found that the two rotameters installed on the anode and cathode pipes were not working properly. Process adjustment and control objectives, etc., and even affect the normal production. After on-site observation and analysis, it is believed that the measured media in the cathode and anode pipelines are both gas and liquid dual-phase media with non-uniform, unfixed proportions; and the flowmeter is a conventional float flowmeter. One of the working principles of the metal tube rotameter is the law of buoyancy, which is related to the density of the measured medium. When the density is unstable, the float will jump. Due to the fact that the liquid is accompanied by an indeterminate gas volume in this working condition, a pulsating flow is generated, which leads to the above phenomenon of the flowmeter. At present, various conventional flow meters are not suitable for gas and liquid dual-phase media, and the flow of salt liquid and alkali liquid in the process must be measured and controlled, that is, flow meters must be installed. Therefore, selecting an available flowmeter or improving the design of an existing flowmeter to meet the measurement requirements of this specific working condition becomes the next step. The selection and determination of the implementation must meet at least the following three points: (1) the wetted parts of the flowmeter must be able to withstand the strong oxidation and corrosion of chlorine-containing salt liquid and alkali liquid in the anode and cathode pipes; (2) installation and connection The size should be the same as the original flowmeter as much as possible to reduce the workload; (3) The flowmeter itself can effectively buffer and reduce the violent fluctuation caused by the randomly generated gas to achieve a reading that can be regarded as a stable value, and the output current signal fluctuation meets the requirements Regulate system requirements. According to the above requirements, after analyzing and comparing electromagnetic flowmeters, turbine flowmeters, vortex flowmeters, rotameters and differential pressure flowmeters, it is believed that only necessary improvements to metal tube rotameters are feasible and the most efficient. best plan. Therefore, the instrument specially designed a metal tube float flowmeter on the basis of its original product. Three improved designs should be implemented for the metal tube rotameter. For the selection of corrosion-resistant materials and anti-corrosion measures, please refer to the metal material manual and combine the actual application of other equipment materials on site. The medium in the anode pipeline is salt solution containing chlorine gas, and all the parts in the sensor that are in contact with the medium are made of titanium (Ti) material. The sealing surfaces of the two flanges and the sealing surfaces of the casing and the conduit assembly are all treated with palladium. The whole sensor has good anti-oxidation and corrosion resistance. The medium in the cathode pipeline is lye, hydrogen and chlorine, etc. All the parts in the sensor in contact with the medium are made of stainless steel (SUS316L), and the entire sensor has good corrosion resistance. It has been proved to be feasible after more than two years of use. Connection size and installation method Since the original flowmeter of the user is installed horizontally, which is completely different from the vertical installation of the conventional float flowmeter and the flow direction of the fluid from bottom to top, it must be designed to be (horizontal) horizontal (horizontal) horizontal. Out of the structure, since the opening size of the existing pipeline is long enough, it is designed as a float flowmeter as shown in Figure 1. To maximize the stability of the flowmeter under working conditions As far as the flowmeter itself is concerned, a common and effective measure to overcome fluctuations (whether caused by external or internal reasons) is to install a damper. Dampers are generally divided into mechanical and electrical (magnetic) types. Obviously, the former should be considered first for rotameters. According to the different damping medium, it is divided into liquid damper and gas damper. Design of the damper The damper must understand and determine the following data: Fluctuation amplitude and frequency: After several hours of observation and statistics on the site, the fluctuation amplitude of the flowmeter without the damper is about 15%~25%, (±7.5%~±± 12%); the frequency is about 180~350 times/min. (1) The damping effect is required: the fluctuation range should not be greater than ±2%; the frequency should not be greater than 50~90 times/min. Of course, since there is no proper instrument for quantitative detection, whether the final effect of damping achieves the expected goal,To a certain extent, it should also be judged and identified by on-site technicians and operators through practical applications. (2) According to the above-mentioned actual working conditions and damping objectives, taking into account the structure size of the rotameter and the specification of the titanium pipe material, etc., after obtaining the damping coefficient, the structure and size of the damper are preliminarily determined, as shown in Figure 2. The optimal size of the gap between the damping chamber and the damping body, which determines the damping effect, can only be determined after field tests. During the test, there is naturally air at the upper end of the metal tube rotameter as a damping medium.
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Abstract: The information on how to reduce the error of natural gas measured by the turbine flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. How to control the error (1) Correctly determine the location and specifications of the flowmeter. Due to the existence of the inertia of the natural gas turbine flowmeter, it is not suitable for use in occasions with frequent flow fluctuations, otherwise the measurement accuracy will be reduced. To more accurately estimate the gas consumption. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to reduce the error of natural gas measured by turbine flowmeters. How to control the error (1) Correctly determine the place and specifications of the flowmeter. Due to the existence of the inertia of the natural gas turbine flowmeter, it is not suitable for use in occasions with frequent flow fluctuations, otherwise the measurement accuracy will be reduced. To more accurately estimate the peak and valley value of gas consumption and the pressure of the medium, correctly determine the specifications of the flowmeter. It can be seen from the error characteristic curve of the natural gas turbine flowmeter that the working flow range of the flowmeter should be 20%Qmax-80%Qmax (Qmax is the maximum flow rate of the flowmeter) (2) Installation requirements for natural gas turbine flowmeter 1. Gas natural gas turbine A filter must be installed before the flowmeter; the filter should be kept unobstructed. If the filter is found to be blocked (it can be judged by the pressure difference between the inlet and outlet of the filter), the filter should be cleaned in time. If the differential pressure gauge is not equipped, the monthly cleaning once. 2. To ensure the requirements of the straight pipe section, especially if there is a reduced diameter or half-open valve in front of the meter. 3. During installation, the gasket shall not protrude into the pipeline, and there shall be no obvious deviation between the flowmeter and the axis of the pipeline, and installation stress shall not be generated. 4. When installing, be sure to clean up all impurities in the pipeline to prevent the bearings and turbine from getting stuck. (3) Operation management and maintenance requirements of natural gas turbine flowmeters 1. Requirements for ventilation and gas stoppage of natural gas turbine flowmeters. Ventilation sequence: ensure that the valve at the back end of the flow meter is closed; then slowly open the valve at the front end of the flow meter to ensure the speed of pressure increase≤35KPa/S; Finally, slowly open the valve at the back end of the flowmeter to make it run from a small flow until it is adjusted to the required value. The entire process remains pressurized to start. Stop gas sequence: first slowly close the back-end valve of the flowmeter; then slowly close the front-end valve of the flowmeter. 2. Prevent excessive operation for a long time. Excessive flow operation will seriously affect the service life, reduce the measurement accuracy, and cause the error to increase; (note that the flow rate percentage under the working condition of the meter head should not exceed 100% for a long time) Instantaneous flow: from the observation of the instantaneous flow, combined with the user's gas consumption at that time Determine whether there is a small fire that does not go away, or a large fire that exceeds the range. The flow range should be between 20% and 70% when the instrument is running. If the long-term low limit operation or high limit operation will affect the measurement; whether it is the user's gas load or the gas-consuming equipment has changed, it should be solved in time. 3. Pay attention to the values ​​of temperature and pressure. According to the gaseous equation: In the equation: V0——Volume in standard state (m3) V——Volume in working state (m3) Zg——Gas compressibility P=Pa+Pg under working condition——Absolute pressure (kPa) Pa at the pressure detection point of the flowmeter——Local atmospheric pressure (kPa) Pg——Gauge pressure at the pressure detection point of the flowmeter (kPa) Po——Standard atmospheric pressure (101.325kPa) To——Absolute temperature in standard state (293.15K) T——Absolute temperature under medium working conditions (273.15+t) Kt——Measured medium Celsius temperature (e) FZ——It can be seen from the formula of the gas compression factor that the errors are mainly concentrated in the detection accuracy of pressure and temperature. When it is found that the flow rate, temperature, pressure value and the actual deviation are large or the displayed value is unstable, or there is a large difference with the previous experience value. Deviations should be dealt with in a timely manner. 4. During routine maintenance or meter reading inspection, you should check whether there are abnormal symbols on the display meter. If the battery symbol flashes, it means that the battery is about to run out of power, and the battery should be replaced in time; if any abnormal alarm or abnormal warning symbol appears, it should be found in time, which will help to deal with and discover the user's illegal gas use behavior. 5. For imported turbine meters with mechanical readings and correctors, in addition to copying the volume value of the standard conditions, it is necessary to compare the readings of the base meter and the working conditions flow on the corrector in time. Normally, the two should be Not much difference. 6. When the process pipeline is overhauled, the flowmeter should be removed, and then wrap both ends with a clean cloth to prevent dirt and iron particles from falling into the flowmeter and damaging the turbine blades. 7. In order to ensure the long-term normal operation of the natural gas turbine flowmeter, the operation inspection of the instrument should be strengthened, and the rotation of the impeller should be monitored. If the sound is abnormal, the internal parts of the sensor should be removed and checked in time. If the turbine bearing is seriously worn or the blade is damaged, it must be repaired, replaced, and re-calibrated. 8. For sensors with lubricating oil or cleaning fluid injection ports, lubricating oil or cleaning fluid should be injected regularly as required to ensure good operation of the impeller. Long-term continuous operation without lubricating oil will inevitably cause fatal wear, increase damping force and cause slower operation, negative difference in measurement results and affect service life; the above is the entire content of this article, you are welcome to inquire about the flowmeter selection of our factory , quotation, etc. 'How to reduce the error of natural gas measurement by turbine flow meter'
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Turbine flowmeters are based on the principle of torque balance and belong to speed flowmeters. The sensor has the characteristics of simple structure, light weight, high precision, good reproducibility, sensitive response, easy installation and maintenance, etc. It is widely used in petroleum, chemical industry, metallurgy, water supply, papermaking and other industries. It is an ideal instrument for flow measurement and energy saving. The sensor is used together with the display instrument, and it is suitable for measuring liquids in closed pipelines that are not corrosive to stainless steel 1Cr18Ni9Ti, 2Cr13, corundum Al2O3, and hard alloys, and have no impurities such as fibers and particles. If it is matched with a display instrument with special functions, it can also perform quantitative control and over-quantity alarm. The explosion-proof type (ExmIIT6) of this product is selected, and it can be used in environments with explosion hazards. The sensor is suitable for media with a viscosity less than 5×10-6m2/s at the working temperature. For liquids with a viscosity greater than 5×10-6m2/s, the sensor must be calibrated with real liquid before use. The fluid flows through the sensor housing. Since the blades of the impeller have a certain angle with the flow direction, the impulsive force of the fluid causes the blades to have a rotational moment. After overcoming the frictional moment and fluid resistance, the blades rotate. After the torque is balanced, the speed is stable. Under certain conditions, The rotation speed is proportional to the flow velocity. Because the blade has magnetic permeability, it is in the magnetic field of the signal detector (composed of a magnetic steel and a coil). The rotating blade cuts the magnetic force line and periodically changes the magnetic flux of the coil. As a result, the electric pulse signal is induced at both ends of the coil, and the signal is amplified and shaped by the amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to the display instrument remotely to display the instantaneous flow or total amount of the fluid.
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