Quantitative control of dosing for circular gear flowmeter

1、 Product I Introduction

HTGF seriesQuantitative control of dosing for circular gear flowmeterBelonging to a volumetric flow transmitter, this high-precision transmitter measures volumetric flow by meshing and rotating gears with the flow of the medium. Under the action of fluid flow, a pressure difference is formed at the inlet and outlet of the instrument, without the need for power supply. A pair of gears rotate freely, and the cavity between them is filled with liquid. The liquid is discharged as it rotates. By measuring the number of revolutions of the gears, the flow rate of the liquid flowing through the instrument can be determined.

2、 Product working principle

HTGF seriesQuantitative control of dosing for circular gear flowmeterWorking principle: The speed of the circular gear flowmeter transmitter is detected by the sensing coil in the signal amplifier installed on the case. The signal amplifier is not in contact with the measured medium. When the transmitter gear cuts the magnetic field lines generated by the long-term magnet inside the case, it will cause changes in the magnetic flux in the sensing coil. The sensing coil will send the detected periodic change signal of the magnetic flux to the preamplifier, amplify and shape the signal, generate a pulse signal proportional to the flow rate, and send it to the unit conversion and flow integration circuit to obtain and display the accumulated flow value. At the same time, the pulse signal is also sent to the frequency current conversion circuit to convert the pulse signal into analog current, and then indicate the instantaneous flow value. The circular gear flowmeter transmitter has high machining accuracy and precise installation. The rotation of the gears is scanned non-contact, and each tooth generates a pulse with very high resolution. The circular gear flowmeter can measure very small liquid flow rates.

3、 Functional Features and Advantages

Product Features and Advantages

High temperature resistance (-196 ℃ -200 ℃)

High pressure resistance (1.0-45MPa)

Can measure various viscous high media

Range width ratio (1:100)

wide measurement range

High precision and high repeatability

Strong anti-corrosion and anti pollution ability (acid-base)

Pulse output/analog output optional

Material: Stainless steel, aluminum alloy, PP optional

Connection methods: flange connection, threaded connection, sanitary flange, card sleeve

Caliber range: 2, 4, 6, 10, 15, 20, 25, 32

Widely applicable fields include:

Resin and adhesive measurement

Measurement of hydraulic oil, lubricating oil, and grease

Fuel oil measurement

Ink and asphalt measurement

Measurement of liquid nitrogen, cryogenic liquid, and solvents

Edible oil, fish oil, and food filling measurement

Chemical and anti-corrosion requirements - Fluid measurement

Fluid Quantitative Control System

4、 Selection of technical parameters

Measurement Range Table

Model

5、 Installation precautions

1. The installation location of the transmitter on site should avoid environments with high temperatures, large mechanical vibrations, strong magnetic field interference, and strong corrosiveness as much as possible. It should be installed in a location that is easy to maintain and repair.

2. The transmitter should generally be installed horizontally, and the sensor must be firmly installed on the assembly with screws. If vertical installation is necessary, the liquid direction must be upward. The liquid should fill the pipeline without any bubbles.

3. When installing the accessories of the transmitter, the centerline of the base should be aligned with the centerline of the pipeline, and the sealing gasket at the connection should not protrude into the liquid.

When installing a flow control valve, it must be installed on the downstream side of the sensor.

When installing sensors on new pipelines, it is recommended to install a filter upstream of the transmitter to prevent impurities from entering the transmitter.

6. In order to avoid affecting the normal transmission of liquid during maintenance, a bypass pipeline should be installed at the installation site of the transmitter.

7. The magnetic field and similar interference sources near the gear flow transmitter may affect the sensor's signal pickup. The connection between the transmitter and the display instrument should use a shielded cable with metal, and the shielding layer of the transmission cable should be grounded at one point on the display instrument end.