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Dynamic differential target flow meter

NegotiableUpdate on 09/17

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Nature of the Manufacturer: Producers

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Overview

The high-quality dynamic differential target flow meter manufacturer provides you with comprehensive product information, which belongs to the high-quality products of target flow meters. We have rich experience in designing flow measurement and metering solutions. For more information about dynamic differential target flow meter manufacturers, pricing and model selection services, please contact us at any time.

Product Details

Dynamic differential target flow meterThe manufacturer of the production quotation for this flowmeter product model belongs toTarget flowmeterClassification: For more direct sales price quotations of target type, dynamic differential, and flow control instruments, please feel free to call us for consultation. Below are the product information details of dynamic differential target flow meters.

Dynamic differential typeIt is a new type of force induction target flowmeter developed based on the measurement principle of traditional target flowmeter, fully utilizing its excellent characteristics, and combining new sensor technology and modern digital technology. It has extremely broad applicability.

Dynamic differential target flowmeterIt is the most commonly used flow meter for measuring and measuring flow in industrial production. It has a simple structure, easy installation, reliable operation, high accuracy, and can meet the needs of engineering measurement. The research design and use have a long history, with rich and reliable experimental data, and the design and processing have been standardized.

Dynamic differential target flowmeterstructure

The target flowmeter mainly consists of a measuring tube (housing), a new type of sensor (including flow blocking elements), an accumulation display, and an output part. According to different media and working conditions, suitable sensors must be selected. Therefore, providing accurate measurement objects and parameters by users and selecting appropriate sensors by manufacturers are the key to whether flow meters can measure accurately.

Target flowmeterIt has the characteristics of simple structure, easy installation and maintenance, and is not easily blocked. It is mainly used to measure the flow rate of low Reynolds number, high viscosity fluids, and slurries containing appropriate amounts of solid particles in pipelines. In addition to the initial measurement, target flow meters can also measure the flow rates of general liquids, gases, and vapors.

动差靶式流量计

Dynamic differential target flowmeterprinciple

When the medium flows in the measuring tube, the pressure difference generated by its own kinetic energy passing through the blocking element exerts a force on the blocking element, and the magnitude of the force is proportional to the square of the medium flow velocity. Its mathematical expression is as follows:

F = CdAρ·V2/2

Where:

F: The force acting on the blocking component (kg)

Cd: drag coefficient of an object

A: The axial projection area of the measuring tube by the flow blocking component (mm2)

P: Medium density under working conditions (kg/m3)

v: The average flow velocity of the medium in the measuring tube (m/s)

The force F received by the blocking component is transmitted to the sensor through a rigidly connected transmission component, and the sensor generates a voltage signal output: V=KF

Where:

V: Voltage output by the sensor (mV), K: Proportional constant, F: Force acting on the resistor (Kg)

After pre amplification, AD conversion, and computer processing, this voltage signal can obtain the corresponding instantaneous flow rate and cumulative total amount.

靶式流量计

Dynamic differential target flowmeterTechnical Specifications

Media: Liquid, Gas, Steam

Nominal diameter: flange type 15~500mm, clamp type 15~500mm, insert type 65~5000mm

Range: Liquid: 1:15, Gas: 1:10

Compensation form: temperature and pressure compensation

Repeatability: 0.05%~0.08%

Power supply: built-in 3.6V lithium battery, external power supply 24VDC

Output format: On site LCD display: 4~20mA. Two wire system: Pulse 0~5V.

Measurement tube material: carbon steel, stainless steel (can be negotiated according to user requirements)

Explosion proof signs: explosion-proof ExdIICT4, intrinsic safety ExiallCT4

Protection level: IP65, IP67

Flange specifications: The flange specifications for flowmeter connections are approved according to the GB/T series, and can also be specially processed according to user requirements.

靶式流量计

Dynamic differential target flowmeterFault handling

1. When the flow velocity of the measured medium in the pipeline is zero, the instantaneous flow rate value indicated by the flowmeter is not zero. The main reasons for this phenomenon are:

a、 The uneven levelness of the flow meter before and after installation results in the axial horizontal force generated by the tilting of the target plate and target rod, leading to the existence of instantaneous flow rate;

b、 The flowmeter operates for a long time, causing slight changes in the internal stress release of its sensor;

c、 During installation or operation, severe overload causes zero drift;

The above three methods can all refer to the steps and methods for clearing flow meters.

2. Poor grounding of flowmeter housing; Solution: The user needs to reconnect to the ground.

3. The target, target rod, and measuring tool are stuck by debris; Solution: Close the front and rear valves of the flowmeter, use tools to loosen the connecting bolts between the transition part of the flowmeter and the measuring tube, gently shake the transition part or remove it, clean up debris, and reset it as it is.

4. The abnormal increase in the reading of the dynamic differential target flowmeter during operation is mainly caused by:

a、 There are filamentous and strip-shaped impurities hanging on the target film and target rod; Handling method: Refer to the method for handling miscellaneous items.

b、 Under high blockage conditions, severe blockage occurs between the target plate and the target rod, resulting in an increase in the projected area of the force bearing element target plate along the axis of the measuring tube, that is, a decrease in the annular flow area between the target plate and the measuring tube. As a result, under the same flow rate, the force on the sensor increases, ultimately leading to an abnormal increase in the flow reading; Solution: Remove the transition component and use tools to remove any debris from the target plate, target rod, and inner wall of the measuring tube.

5. There are many reasons for the large measurement error, and the main reasons are as follows:

a、 During installation, there is a significant misalignment in the concentricity between the flowmeter and the connecting pipeline, and the sealing gasket is not concentric, resulting in the formation of a throttling resistor and greatly affecting the flow state of the measured medium; Solution: Adjust the installation status.

b、 The straight pipe sections before and after the flowmeter are too short, and elbows, valves, and other components that greatly interfere with the flow state of the measured medium are directly installed in front of the flowmeter; Solution: Install according to the instructions or perform on-site flow calibration on the flowmeter.

c、 Leakage of bypass pipeline; Solution: Check and replace the bypass pipeline.

d、 There are strip-shaped debris wrapped around the target, which increases the stress on the target; Handling method: Refer to the previous method for handling miscellaneous items.

6. There are four main reasons why the flowmeter has no indication or signal:

a、 Poor contact or detachment of power supply; Solution: For flow meters with built-in batteries, check if the battery is securely installed, if the contacts are in good condition, and if the battery is charged. For external power supply, it is necessary to check whether the connection between the connecting wires is intact, whether the wires are conductive, and whether the external power supply is normal.

b、 The flow meter circuit is damaged; Solution: Return to the factory for repair.

c、 The display screen is damaged; Solution: Return to the factory for replacement.

d、 User signal receiving system malfunction; Solution: Check and troubleshoot.

7. The reading of the flowmeter remains zero during operation, and the main reasons for this phenomenon are:

a、 The force bearing component (target) falls off, causing the sensor to be unable to sense; Solution: Assemble target pieces of the same specifications.

b、 The flowmeter sensor has no voltage output signal; Solution: First, check if the sensor is damaged. The specific method is to check if there are any changes in the sensor data.

c、 The flow rate of the measured medium is too small, lower than the minimum scale flow rate of the flowmeter; Solution: Return to the factory and replace the load-bearing components.

The above is the complete content of the target flowmeter dynamic differential flowmeter product. Welcome to inquire about the selection and quotation of the target flowmeter dynamic differential flowmeter by phone.

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