Second, the characteristics:
★ Small pressure loss.
★ Strong anti-electromagnetic interference and vibration resistance, reliable performance and long service life.
★ Advanced ultra-low power single chip microcomputer technology is adopted, with powerful functions, low power consumption and superior performance. Intelligent flow display with nonlinear precision compensation function. The accuracy of the modified formula is better than 0.02%.
★ The instrument coefficient can be set online by pressing the key, and can be displayed on the LCD screen, which is intuitive and clear with high reliability.
★ EEPROM is used for power-off protection of cumulative flow and instrument coefficient. The protection time is longer than 10 year.
Three. Main technical parameters:
★ Flowmeter specifications, basic parameters and performance indicators (see Table 2)
★ Accuracy: 0.5,1.0;
★ Conditions of use:
1, ambient temperature-20℃ ~ 50℃;
3. Temperature of measured medium:-20℃ ~120℃;
4. Atmospheric pressure: 86 kPa ~106 kPa;
5. Explosion-proof grade: ExibⅱBT4.
★ Signal transmission distance: the distance from the sensor to the display can reach1000 m..
Four, electrical characteristics:
1, display mode:
(1)LWGY remote transmission display: pulse output (with display instrument);
(2)LWY field display: liquid crystal display cumulative flow, unit (m & amp； sup3)
Liquid crystal display instantaneous flow, unit (m & amp； sup3/h)
(3)LWGB turbine flow transmitter: (equipped with display instrument).
2. Output function:
(1)LWGY pulse output, p-p value is determined by power supply;
(2)LWY can take pulse output or 4~20mA two-wire current output;
(3)LWGB 4~20mA double-wire current output.
3. Power supply:
( 1)LWGY:DC5 ~ 24V；
(2) LWY: The 3V lithium battery installed in the instrument can be used continuously for 3~5 years; technical superiority
Turbine flowmeter has the advantages of high precision, good repeatability, no zero drift and high range ratio. Turbine flowmeter has high-quality bearings and specially designed guide vanes, so it greatly reduces wear and is insensitive to peak values, and can even give reliable measurement variables under harsh conditions. The output signal of turbine flowmeter is pulse, which is easy to digitize. The turbine flowmeter has small pressure loss, the blades are corrosion-resistant, and it can measure viscous and corrosive media. structure
The general principle block diagram of LYGY turbine flowmeter is shown in the following figure.
(1) has high accuracy and belongs to the more accurate flowmeter among all flowmeters;
(2) Good repeatability;
(3) No zero drift, strong anti-interference ability;
(4) Usage profile:
Turbine flowmeter is widely used in the following measurement objects: petroleum, organic liquid, inorganic liquid, liquefied gas, natural gas and cryogenic fluid are all in Europe and America. The consumption of turbine flowmeter is second only to orifice flowmeter. In the Netherlands alone, there are more than 2,600 gas turbine flowmeters of various sizes and pressures ranging from 0.8 to 6.5MPa to 6.5 MPa, which have become excellent natural gas metering instruments. ★ The pressure loss is small, and the impeller has anti-corrosion function;
★ Using advanced ultra-low power single chip microcomputer technology, the whole machine has powerful functions, low power consumption and superior performance.
★ Intelligent flow display with nonlinear precision compensation function. The accuracy of the modified formula is better than 0.02%
★ The instrument coefficient can be set online by pressing the key and displayed on the LCD screen, which is intuitive, clear and reliable.
★ EEPROM is used for power-off protection of cumulative flow and instrument coefficient, and the protection time is longer than 10 years.
★ High-performance MCU CPU is used to complete data acquisition and processing, and the output and cumulative flow are displayed, and the instantaneous flow is the same.
★ Convenient man-machine interface for screen display, transmitting data in the form of standard 485.
★ All-hard alloy (tungsten carbide) shielded cantilever bearing is adopted, which integrates rotary bearing and pressure bearing, greatly improving the service life of the bearing, and can work in a medium containing a small amount of sediment and dirt.
★ All stainless steel structure of 1Cr 18Ni9Ti is adopted (the steam turbine adopts 2Cr 13), which has good corrosion resistance.
★ Convenient maintenance, self-correcting structure, small and light, simple structure, and can be disassembled in a short time.
★ Simple internal cleaning.
★ Strong anti-magnetic interference and vibration ability, reliable performance and long service life.
★ Low lower limit speed and wide measuring range.
★ The on-site LCD display is clear and intuitive, with low power consumption, and the power supply of 3V lithium battery can run continuously for more than 5 years.
★ Corrosion-resistant, suitable for acid-base solution fluid flowing through the sensor housing. Because the blades of the impeller have a certain angle with the flow direction, the impulse of the fluid makes the blades produce rotating torque. After overcoming the friction torque and fluid resistance, the blade rotates and the speed is stable after torque balance. Under certain conditions, the speed is proportional to the flow. Because the blade has magnetic conductivity, it is in the magnetic field of the signal detector (composed of permanent magnet steel and coil), and the rotating blade cuts the magnetic field lines and periodically changes the magnetic flux of the coil.
The pulse signal is amplified and shaped by an amplifier to form a continuous rectangular pulse wave with a certain amplitude, which can be transmitted to a remote display instrument to display the instantaneous flow and accumulation of fluid. In a certain flow range, the pulse frequency f is directly proportional to the instantaneous flow q of the fluid flowing through the sensor, and the flow equation is: q = 3600× f/k.
Among them:
F- pulse frequency [Hz];
K—— Instrument coefficient of sensor [1/m], which is given by the check table. If Q=3.6×f/k, the unit is [1/L]
Q—— instantaneous flow rate of fluid (under working conditions) [m3/h];
3600- conversion factor.
The instrument coefficient of each sensor is filled in the verification certificate by the manufacturer, and the K value is set in the supporting display instrument, so that the instantaneous flow and cumulative total can be displayed. Nominal diameter: pipeline type: DN4~DN200
Plug-in type: DN 100 ~ DN 2000
Accuracy grade: pipeline type: 0.5, 1.0.
Plug-in types: 1.5 and 2.5.
High accuracy can reach 0.2 level.
Ambient temperature: -20℃ ~ 50℃
Medium temperature: measuring liquid: -20℃ ~ 120℃
Measuring gas: -20℃ ~ 80℃
Atmospheric pressure: 86 kPa ~ 106 kPa
Nominal pressure: 1.6 MPa, 2.5 MPa, 6.4 MPa, 25 MPa.
Explosion-proof grade: ExdIIBT4
Connection mode: threaded connection, flange clamping, flange connection, plug-in, etc.
Requirements for straight pipe section: gas: upstream straight pipe section ≥ 10DN, downstream straight pipe section ≥5DN.
Liquid: upstream straight pipe section ≥20DN, downstream straight pipe section ≥5DN.
Plug-in type: the upstream straight pipe section is ≥20DS, and the downstream straight pipe section is ≥7DS(DS is the measured inner diameter of the pipeline).
Display mode: (1) remote display: pulse output, current output (with display instrument)
(2) On-site display: 8-bit LCD displays the cumulative flow in m3.
4-bit LCD displays instantaneous flow, unit (m3/h), battery power, frequency and flow rate.
(3) Temperature and pressure compensation type:
A, display standard instantaneous flow and standard cumulative flow.
Displays the current pressure, temperature and battery voltage.
Output function:
(1) pulse output, and the p-p value is determined by the power supply.
(2) 4 ~ 20ma double-wire current output
(3) unit volume pulse output and sensor original pulse output
(4) With RS485 communication interface
Power supply:
( 1)DC5~24V
(2) The standard 3V lithium battery installed in the instrument can be used continuously for more than eight years.
(3) The 3V lithium battery with temperature and pressure compensation can be used continuously for more than four years when installed in the instrument.
Transmission distance: the distance from the sensor to the display can reach 500m m.
(1) plug-in turbine flowmeter
(2) Gas turbine flowmeter
(3) Intelligent turbine flowmeter
(4) Liquid turbine flowmeter
(5) Clamp type liquid turbine flowmeter
(6) Anti-corrosion turbine flowmeter
(7) High pressure turbine flowmeter
(8) High-precision turbine flowmeter: High-precision turbine flowmeter is an advanced liquid flowmeter based on Swiss patented flow technology. The radial flow of the rotor caused by the special geometric combination of the rotor shell is combined with the lightweight polyethylene fiber rotor, so that the rotor is suspended in the middle. The high-precision turbine flowmeter has almost no resistance in the process of rotor floating measurement, which ensures the high precision, linearity and durability of the turbine flowmeter.
(9) G series GPI precision turbine flowmeter: GPI G series precision turbine flowmeter is a precision product with high precision and good repeatability. Precision turbine flowmeter is suitable for high temperature, high pressure and strong corrosion occasions; It is the best choice for liquid food industries such as milk, wine and beverage with 3A health grade certification.
(10)G2 series industrial-grade GPI turbine flowmeter: GPI G2 series industrial-grade turbine flowmeter is an industrial-grade product with compact structure, modularization, convenient installation, high precision and good repeatability. Industrial turbine flowmeter products can be widely used in water treatment, beverage, chemical industry, pharmacy, petroleum products and other industries, as metering, batching, control and other purposes.
use
Turbine flowmeter is a kind of speed instrument, which has the advantages of high precision, good repeatability, simple structure, few moving parts, high pressure resistance, wide range, small volume, light weight, small pressure loss and convenient maintenance. It is used to measure the volume flow and total amount of low viscosity gas in closed pipeline. Widely used in petroleum, chemical industry, metallurgy, urban gas pipe network and other industries.
Diameter, accuracy and flow parameters of turbine flowmeter: instrument diameter and connection mode are 4, 6, 10, 15, 20, 25, 32, 40, and threaded connection (15, 20, 25, 32, 40)50, 65 is adopted. 1: 15; 1:20 instrument materials: 304 stainless steel, 3 16(L) stainless steel, etc. The measured medium temperature is (℃)-20 ~+ 120℃, the ambient temperature is-10 ~+55℃, the relative humidity is 5% ~ 90%, and the atmospheric pressure is 86 ~. LWGY-□C type: +24VDC signal transmission line 2×0.3 (two-wire system) transmission distance ≤ 1000m signal line interface internal thread M20× 1.5(LWGY-□C type) explosion-proof grade ExdIIBT6 protection grade IP65 instrument caliber (mm) normal flow range (m3/ H). Special pressure grade (MPa) (flange connection) DN 4 0.04 ~ 0.25 025 DN 251~10 0 0.5 ~10 6.3, 2.5 (flange) 4.0, 6.3, 12,/. 12, 16, 25DN 402 ~ 20 1 ~ 206.3, 2.5 (flange) 4.0, 6.3, 12, 16, 25dn504 ~ 404. 25 DN 65 7~70 4~70 2.5 4.0、6.3、 12、 16、25 DN 80 10 5 ~ 100 2.5 4.0、6.3、 12、 16、25 DN 100 20 ~ 200 65440
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The diameter is 4 * * * * * 4 mm, the standard range is 0.04 ~ 0.25m3/h, the wide range is 0.04 ~ 0.4m3/h66mm, the standard range is 0. 1 ~ 0.6m3/h, and the wheel with wide gauge is 0.06 ~ 0.6m3/h1065433. The standard range is 0.2 ~ 1.2m3/h, the wide range is 0.5 ~1.5m3/h15mm, the standard range is 0.6 ~ 6m3/h, and the wide range is 0.4 ~ 8m3/h2020. The standard range is 1 ~ 10m3/h, the wide range is 0.5 ~ 10m3/h3232mm, the standard range is 1.5 ~ 15m3/h and the wide range is 0.8 ~/kloc. Wide range 1 ~ 20m3/h 5050mm, standard range 4 ~ 40m3/h, wide range 2 ~ 40m3/h 6565mm, standard range 7 ~ 70m3/h, wide range 4 ~ 70m3/h 8080mm and standard range10 ~ 6544. The wide range is 5 ~100 m3/h100 mm, the standard range is 20 ~ 200m3/h, and the wide range is10 ~ 200m3/h1251. Wide range13 ~ 250m3/h150150mm, standard range 30 ~ 300m3/h, wide range 15 ~ 300m3/h200200mm, and standard range 80 ~ 800m3/h.
W-type wide-range turbine S standard turbine material S 304 stainless steel L 3 16(L) stainless steel explosion-proof E explosion-proof type (explosion-proof grade: ExdⅱBT6) pressure grade N conventional H(x) high pressure note: dn 15 ~ dn40 is a conventional threaded connection. If flange connection is required, please add "(fl)" after "nominal diameter".