LWGY-100 turbine flow meter

LWGY-100 turbine flow meter

I. Overview

The LWGY Series Liquid Turbine Flow Meter measures the flow of liquids. The sensor has the characteristics of high precision, long life, simple operation and maintenance, etc. It is widely used in petroleum, chemical, metallurgy, water supply, papermaking and other industries. It is the ideal instrument for flow measurement and energy saving.

Second, the principle

When the liquid to be measured passes through the sensor, the impeller in the sensor rotates with the kinetic energy of the liquid. At this time, the impeller blades cause the magnetic resistance (optical path cutting) of the magnetic circuit in the detection device to change periodically, so that an electric pulse signal proportional to the frequency and the flow rate is induced at both ends of the detection coil, and is transmitted far after being amplified by the amplifier. Out.

LWGY-100 turbine flow meter

Third, technical parameters

1, the basic parameters: see Table 1

2, medium temperature: -15 °C ~ +130 °C

3, the ambient temperature: -20 ~ +60 °C

4, transmission distance: the distance from the sensor to the display instrument up to 1000m

5, the output signal: voltage pulse, 4 ~ 20mA

6, communication interface: use RS-485 communication interface.

7, power supply: sensor: 12V DC (pulse output) Transmitter: 24VDC (current output) 3.6V battery

Fourth, selection classification

LWGY-100 turbine flowmeter has three series of G (high), Z (medium) and D (low), working pressure up to 50Mpa. It is mainly used for the measurement of high-pressure water in oilfield water injection systems. It is also suitable for flow detection of various high and low pressure water machine systems.

The use of fully cemented carbide (tungsten carbide) shielded cantilever beam bearings, bearing bearings and pressure bearings in one, greatly improving the bearing life, and can work in a small amount of sediment and dirt medium.

The sensor adopts stainless steel structure (turbine adopts 2Cr13) with good anti-corrosion performance. Samarium cobalt permanent magnets are used as signal detectors with strong output signals and good magnetic stability. They can work normally in 0-120°C medium.

Easy to maintain, the flow meter has a self-rectifying structure, small and lightweight, simple structure, can be split in a short time, the internal clear and simple.

A, on-site display type

The smart flowmeter is a new type of flow meter display instrument designed with advanced single-chip microcomputer technology, and it is matched with the flow sensor (such as turbine and vortex) with pulse signal output. Instantaneous flow and cumulative totals can be displayed. Cumulative flow: eight digits, with 3 significant digits after the decimal point. Instantaneous flow rate: Six digits to show the change per litre. Display accuracy: ±1 display units. Signal output: pulse output: 1~3000Hz external supply +12~+24VDC power supply current output: 4~20mA external supply +24VDC power supply (two-wire system) built-in 2 3V lithium battery parallel power supply. When the voltage is lower than 2.7V, undervoltage indication occurs, flameproof type. Small signal removal function.

B, pulse output type

Operating voltage: +12VDC or +24VDC (Customer must select a power supply before ordering). Signal transmission distance: less than 250 meters. Output Signal: Square Wave Signal Amplitude: +12 VDC The amplitude of the power supply is approximately 10V + 24 VDC The amplitude of the power supply is approximately 20V Installation: The amplifier and turbine flow sensor are connected to M16 × 1.5 threads. After the turbine flow sensor is installed, the amplifier is screwed to On the turbine flow sensor, tighten the lock nut by hand until it reaches the sensor amplifier. Wiring: The pulse output amplifier has three external leads, red, white, and shield. The red line is connected to the power supply, and the white line is used to connect the pulse output to other display devices or devices, and the shield is grounded.

C, 4 ~ 20mA output type

Operating voltage: External power supply +24VDC (two-wire system) Output signal: 4~20mA or 1-5V, 4mA corresponds to zero flow of the turbine flow sensor, 20mA to the maximum flow of the turbine flow sensor, flow range see the nameplate of the turbine flow sensor. Signal transmission distance: less than 250 meters. Installation: After installing the turbine flow sensor, screw the amplifier to the turbine flow sensor connector (m16 x 1.5 thread) and tighten the lock nut by hand until the sensor amplifier has reached the end. Wiring: The 4~20mA output amplifier external leads are red and white. The red line is the power line and the white line is the signal line.

D, split remote display type

Operating voltage: External power supply 220VAC signal transmission distance: less than 250 meters Instantaneous four digits: cumulative total of nine display display size: horizontal: 160mm × 80mm vertical: 80mm × 160mm display with 4 ~ 20mA output and Can connect with computer.