Abstract: the tunnel grouting electromagnetic flowmeter application information produced by excellent flow meter, flow meter manufacturer to offer you the quotation.

Municipal engineering haicang submarine tunnel choose multiple sets of electromagnetic flowmeter, dedicated to the tunnel grouting at present, Beijing sichuan flowmeter has been mainly used in municipal engineering in city: haicang submarine tunnel, subway line no. 3 WuYuan bay tunnel, lian yue TieShiBaJu, railway tunnel, the tunnel,.

More flow meter manufacturers choose model price quote you are welcome to inquire, here is a tunnel grouting electromagnetic flowmeter applied article details.

Municipal engineering haicang submarine tunnel choose superfamily real Chinese shares many sets of electromagnetic flowmeter, dedicated to the tunnel grouting.

Grouting in the construction process of grouting and water flow measurement is very important.

Especially the use of liquid flow meter has its special requirements, such as easy to clean frequently, and can withstand the grouting and particles of friction in bad environment.

In flow meter products, the advantages of the electromagnetic flowmeter is not affected by the fluid temperature, pressure, density and viscosity, the effect of internal flow is smooth, electrical measurement directly, high measurement precision, fast response speed.

Testing part not activity part of it, there will be no dripping phenomenon, lining can be made from teflon and alumina ceramic, strong corrosion resistance.

In recent years, it has become flow measurement instrument of choice in the grouting engineering.

Tunnel grouting application note 1 electromagnetic flowmeter to measure the influence of the amount of mud adhered to the pipeline and processing time after grouting, the residue slurry electromagnetic flowmeter measurement pipe shall be removed in a timely manner, otherwise the slurry prone to change measuring degree of pipeline.

Electromagnetic flowmeter measurement pipe and connection of grouting cement was even blocked.

Electromagnetic flowmeter measurement tube of adhesive layer can lead to other relative error.
The electrical conductivity of cement layer is extremely low.
The greater the thickness of the attachment, the bigger the error.

2 bubbles in the medium and the influence of processing due to the process or the medium itself, measured liquid usually contain a lot of bubbles.

When bubbles through the electrode surface, electrode surface friction process, leading to the peak pulse interference potential value is greater than normal.

Usually, electromagnetic flow converter cannot handle such interference effectively, lead to unstable measurement values.

Therefore, we should consider the installation position of electromagnetic flowmeter, in order to prevent the bubble.

Normally, should be installed at pump discharge side, best vertical installation.
Slurry flow from down to up.

Level when installation, please make the electrode axis parallel to the horizontal line, and not perpendicular to the horizontal line, because the bottom electrode is covered by sediment, easily the top electrode is easy to accidentally bubbles in liquid.
The electrode surface.

3 bad construction site environment and deal with most of the time, the influence of grouting construction site environment is relatively poor, such as (
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Such as high temperature, high humidity and high dust, time condensed water and dust is easy to accumulate in the EMF junction box, or through a joint of poor sealing surface infiltration EMF shell, this will lead to the EMF converter input circuit impedance drops and weaken the traffic.
Signal is sent to the amplifier;

Or damage the insulation of the drive circuit and signal circuit, lead to severe EMF of failure.

In order to avoid such failures, junction box can fill the insulating material.

When maintenance and debugging the EMF, the water must be avoided, keep the junction box dry clean, and avoid in the process of using immersed in water or mud.

At present, China is in a new upsurge of construction.
Is a large amount of cement grouting.

Dynamic measuring cement grouting quantity accurately is very important.

With its unique advantages, has become the electromagnetic electromotive force in grouting project of choice for the flow measurement instruments, and can be widely used.

Compared with using a ruler, the accuracy of the electromagnetic flowmeter is used to measure the amount of mud is greatly increased, avoids many man-made factors, and to ensure the data authenticity and played an important role to ensure project quality.

However, before the use should check and examine the EMF, in order to ensure to achieve the required accuracy.

Below is the electromagnetic flowmeter grouting in tunnel engineering application cases.
“

At present, the main tunnel has passed the shaft into the tunnel construction, only 50 meters from the nearest waters.
”
Station in xiamen western channel tunnel of the left line of haishu side (
Haishu tunnel)

The excavation site, the site staff said loudly in the roar of the machines, and other

By the end of this year, the construction of the west two channels will be officially into the sea, and gradually digging to the bottom of the sea 72 meters deep.
”
Tunnel grouting construction unit electromagnetic flowmeter (
TieShiBaJu)

In xiamen west two channel construction site, large machines roar, bring the earth come and go.

Workers and machine cooperation reinforcement to dig the tunnel, it is a busy scene.
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Abstract: The information on how to identify the quality of the vortex flowmeter is provided by the excellent flowmeter and flowmeter manufacturers. Vortex flowmeter is an extremely versatile flow meter, which can be used in almost all gas, liquid and steam flowmeter measurement and control. Our company has developed a new generation of HHWJ series digital intelligent vortex flowmeter with international advanced level. , it breaks. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following is the article details on how to identify the quality of vortex flowmeters. Vortex flowmeter is an extremely versatile flow meter, which can be used in almost all gas, liquid and steam flowmeter measurement and control. Our company has developed a new generation of HHWJ series digital intelligent vortex flowmeter with international advanced level. , it breaks through the limitation of the traditional analog way to process the vortex street signal, through the modern digital signal processing method to identify and filter the vortex street probe signal, so as to obtain the normal flow signal, greatly improve the seismic performance of the vortex street, fundamentally It has solved the problem that the vortex street is not anti-seismic for decades. It is widely used in the flow of water, salt and wind in petrochemical, light industry, thermal power, papermaking and other industries. Determining the quality of the vortex flowmeter is related to two parts: 1. The probe; 2. The circuit board probe: there are two piezoelectric crystals, one for anti-vibration interference and one for detection. The probe leads are the two leads of the test piece. The probe shell is inserted into the vortex body tube wall and fixed on the vortex body tube wall through the fixing flange. The probe can work normally under 300℃, and can resist up to 350℃. If the temperature is higher, it will destroy the sealed porcelain body, degrade the performance of the probe, and even damage the probe. We have available multimeters“×10k”If there is resistance, the performance of the probe will be degraded; if it is below tens of kiloohms, the probe will be damaged. Circuit board: Its design is directly related to whether the signal generated by the vortex street is correct or not. We can usually view the waveform generated by the flowmeter when it is working with an oscilloscope. The sealing between the sensor and the meter body of the vortex flowmeter is very important in production. If the sealing is not good, the meter will leak. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'How to identify the quality of the vortex flowmeter'
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Summary of fault handling in mass flowmeter two-phase flow measurement (1) The mass flowmeter has been out of tolerance, and it has been checked that it is not installed on the same axis of the pipeline to generate stress, resulting in inaccurate sensor measurement, unable to calibrate to zero, and sensor damage . (2) The problem of gas-liquid two-phase and excitation current exceeding the limit occurs. Three measures can be taken to increase the system pressure: ①Reduce the back valve, ②Install the meter at the outlet of the pump or at the lower part of the upward pipeline, ③Check whether the filter installed at the outlet of the pump conforms, it may be caused by the filter. A gas-liquid two-phase flow occurs. (3) There is an error in the PLC configuration of the mass flow meter and the quantitative loading control system. Two measures can be taken: ① Use Modbus protocol and RS-485 instead of 4-20mA and pulse signal output, so as to directly eliminate errors; Correct the processing to reduce the error as much as possible. (4) False metering occurs during use, even if there is no flow accumulation, it will change. It was confirmed by on-site inspection that the flange was asymmetrical when the flowmeter was installed, resulting in stress. (5) During the passing of the vehicle, there are more and less, and it is confirmed by on-site inspection that the solenoid valve located downstream of the mass flow meter is quickly closed, causing a strong fluid hydraulic impact, which has a great impact on the sensor. If the flow meter is connected with The interchange position of the solenoid valve cuts off the influence of the solenoid valve on the flowmeter, so that the flowmeter can work normally. (6) The electric control valve behind the flowmeter is leaking. The nominal pressure of the electric control valve design is lower than the system pressure, so the valve cannot be closed. Replace the electric control valve whose nominal pressure is greater than the system pressure. (7) The curve fluctuates greatly during the loading process. Two measures can be taken: ① Control the flow rate by controlling the valve, ② Reduce the influence of pipeline vibration and other factors by setting a small flow cut-off. (8) During the use of the flowmeter, it is necessary to regularly check whether the working parameters have changed. If there is a large deviation from the actual situation, re-calibrate the zero flow according to the method described in the manual. When calibrating, the rear valve should be closed so that the flow can fill the pipe.
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Coriolis Mass Flowmeter: Accuracy Meets Efficiency

Coriolis mass flowmeters are a critical component in numerous industrial processes, with their ability to accurately measure the flow of liquids and gases. Their unique design and operation make them a reliable choice for a wide range of applications, from chemical and petrochemical processing to food and beverage production. In this article, we will explore the functionality and benefits of Coriolis mass flowmeters, as well as their impact on improving efficiency and accuracy in various industries.

The Principle of Operation

Coriolis mass flowmeters operate on the principle of the Coriolis effect, which is an inertial force that causes a moving fluid to be deflected in a rotating frame of reference. The basic components of a Coriolis mass flowmeter include a straight tube through which the fluid flows, an exciter to induce vibration in the tube, and sensors to measure the resulting motion. As the fluid flows through the vibrating tube, it causes it to twist in proportion to the mass flow rate. By measuring the phase difference in the vibrations at different points along the tube, the mass flow rate can be accurately determined.

The advantage of this principle is that it provides direct mass flow measurement, without the need for additional density or temperature compensation. This makes Coriolis mass flowmeters highly accurate across a wide range of fluid types and operating conditions. Additionally, the direct measurement of mass flow eliminates the need for separate volumetric or density measurements, simplifying the overall system and reducing the potential for errors.

Benefits of Coriolis Mass Flowmeters

The use of Coriolis mass flowmeters offers several key benefits to industries and processes that rely on accurate flow measurement. One of the primary advantages is the unparalleled accuracy provided by these devices. With typical accuracy levels of 0.1% or better, Coriolis mass flowmeters are able to provide precise measurements even in demanding and critical applications. This level of accuracy ensures that processes can be tightly controlled and optimized for maximum efficiency and quality.

In addition to their accuracy, Coriolis mass flowmeters also offer a high level of reliability. Their direct mass flow measurement and robust construction make them suitable for use in harsh and challenging environments, where other flow measurement technologies may struggle to maintain accuracy and performance. The ability to withstand high pressures, temperatures, and corrosive fluids makes Coriolis mass flowmeters a versatile choice for a wide range of industries.

Another key benefit of Coriolis mass flowmeters is their ability to provide real-time measurement and data, allowing for immediate process adjustments and control. This real-time feedback enables operators to quickly respond to changes in flow rates or fluid properties, minimizing waste and ensuring consistent product quality. Furthermore, the direct measurement of mass flow means that there is no need for separate measurements of density or temperature, simplifying the overall system and reducing installation and maintenance costs.

Applications of Coriolis Mass Flowmeters

Coriolis mass flowmeters are utilized in a diverse array of industries and applications, where their accuracy and reliability are essential for successful operations. In the chemical and petrochemical industry, Coriolis mass flowmeters are used to measure the flow of raw materials, process intermediates, and finished products. Their ability to handle a wide range of fluid types, including corrosive and abrasive materials, makes them an ideal choice for these demanding applications.

In the food and beverage industry, Coriolis mass flowmeters are employed for the precise measurement of ingredients, as well as the monitoring of process flows during production. Their hygienic design and high accuracy make them well-suited for applications involving ingredients such as flavors, colors, and additives, where precision and consistency are critical to the final product. Additionally, the ability of Coriolis mass flowmeters to handle viscous and sticky fluids makes them suitable for measuring syrups, sauces, and other food products.

In the pharmaceutical and biotechnology sector, Coriolis mass flowmeters are utilized for the accurate measurement of process fluids, as well as the monitoring of batch and continuous processes. Their ability to provide real-time feedback and control ensures that critical operations maintain the necessary precision and quality standards. Furthermore, the direct mass flow measurement enables the efficient handling of expensive and sensitive materials, minimizing waste and maximizing yield.

Integration and Considerations

When integrating Coriolis mass flowmeters into a process or system, several key considerations should be taken into account to ensure optimal performance and reliability. The first consideration is the selection of the appropriate flowmeter size and configuration for the specific application. Factors such as the flow rate range, fluid properties, and operating conditions should be carefully evaluated to determine the most suitable model and design.

Another important consideration is the installation and mounting of the flowmeter. Proper installation is essential for accurate and reliable measurement, as any disturbances or incorrect positioning can affect the performance of the flowmeter. It is important to follow the manufacturer's guidelines and recommendations for installation, as well as to ensure that the necessary straight pipe lengths and conditions are met to achieve accurate measurement.

Calibration and maintenance are also important aspects of ensuring the continued accuracy and performance of Coriolis mass flowmeters. Regular calibration and verification of the flowmeter's performance are essential to confirm its accuracy and reliability. Additionally, proactive maintenance practices, such as cleaning and inspection, should be carried out to prevent any potential issues and ensure the long-term functionality of the flowmeter.

Conclusion

In conclusion, Coriolis mass flowmeters offer a combination of accuracy, reliability, and efficiency that make them an indispensable tool in a variety of industrial processes. Their ability to provide direct mass flow measurement, high accuracy, and real-time feedback make them suitable for applications across numerous industries, including chemical, food and beverage, pharmaceutical, and more. By carefully considering the principle of operation, benefits, applications, and integration considerations of Coriolis mass flowmeters, industries can maximize their operational performance and quality standards. With their unparalleled capabilities, Coriolis mass flowmeters continue to play a vital role in advancing efficiency and accuracy in industrial processes.